Server PureCSS files as HTTPS
Server PureCSS files as HTTPS

Ref: some browser blocked pure-css when site deployed as HTTPS reported by
@xusiwei

sunprinceS/blackburn,yoshiharuyamashita/blackburn,cathalgarvey/blackburn-mod,sunprinceS/blackburn,cathalgarvey/blackburn-mod,yoshiharuyamashita/blackburn,lzkill/blackburn,lzkill/blackburn